The U-boot museum at Sassnitz (on the island of Rugen) have the ex-RN submarine HMS Otus on display. I am yet to work out why the Germans felt it necessary to preserve an O-boat - there doesn't appear to be any particular connection to Germany, and with another seven of them on display (8 if you count what's left of Otway), some of which are very well funded, the case for preserving yet another one appears weak - it’s a shame they didn't put their efforts into saving something more unique/exotic.But in any case, I was keen to have a look at it to compare it to the other Oberons I have seen (she is the 4th I have visited this year - 5th if you count Otway). She is in what seems to be a pretty busy area. There is a car park right there with an English-language vending machine. The ticket kiosk is by the gangway and only accepts cash. They have a small range of souvenirs available for sale. The submarine looks to be in reasonable condition. Access is via the forward and after torpedo hatches, and you get to walk the length of the main deck. There is bilingual labelling through the submarine, but not a huge amount of detail. Otus still has the original bow sonar, so the bow is externally quite different to Onslow. Another thing that was different is that the access hatches provide visibility into the casing structure so that the actual pressure hull is clearly visible - this isn't something you commonly see on submarines. Internally the layout of the submarine was significantly different to Onslow - it isn't clear to me whether they were built different, or whether we modified the Australian boats when we upgraded them - the only compartments that were essentially the same were the machinery compartments. I'll need to check my photos, but I'm pretty sure Ocelot in Chatham was pretty much the same as Otus (as you would expect). On Otus, they also seem to have removed some of the decking, so that you could see one of the motors - which aren't visible on Onslow. Overall it seems to be a well-run museum, and a well-presented ship. The location is nice - but a long way from anywhere. I would imagine most people interested in RN submarines would find it easier to get to Chatham, than Sassnitz!
Links and References:
World of Submarine | Museum in Sassnitz on the island Ruegen
Fox, D, 2015, HMS Otus: The Survivor, Warship World, 14 (5), pp15-16.